| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 6 |
2.6%
|
| 2 | 4 |
1.7%
|
|
| 3 | 6 |
2.6%
|
|
| 4 | 10 |
4.3%
|
|
| 5 | 15 |
6.4%
|
|
| 6 | 27 |
11.6%
|
|
| 7 | 38 |
16.3%
|
|
| 8 | 46 |
19.7%
|
|
| 9 | 53 |
22.7%
|
|
| 10 | Very effective | 28 |
12%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 158 |